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Verfahren zur Oberflaechenstrukturierung und oberflaechenstrukturiertes Werkstueck

Texturing surfaces with a bang
 
: Ziegler, L.; Keicher, T.; Elsner, P.; Eyerer, P.; Komanschek, V.

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Frontpage ()

DE 1998-19806870 A: 19980219
DE 1998-19806870 A: 19980219
EP 1999-100286 A: 19990109
DE 19806870 A1: 19990826
EP 937562 B1: 20010905
EP 937562 B1: 20010905
B29C0033
F42D0003
German
Patent, Electronic Publication
Fraunhofer ICT ()

Abstract
NOVELTY - A layer (12) with a structuring surface (14) intervenes between an explosive sheet (16) and the surface of the workpiece (11). On detonation, the structure is impressed. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for a workpiece made as described, for plastic processing. Preferred features: In a related method it is the explosive layer which is structured and laid directly onto the workpiece. The explosive itself, generates and impresses the texturing. The texturing layer is as thin as possible. The explosive has a high detonation velocity. Between workpiece surface and structured material there is at least one intermediate layer. The surface of the explosive is first structured, before laying it on the workpiece and setting it off. The explosive is coated as a paste, fluid or melt onto a structure. It is hardened and removed, to be laid on the workpiece. The structure is blasted into the workpiece surface as a negative or positive form. USE - To impress a textur e into a surface, especially to make a die for: injection-molding, blow-molding, pressing, foaming, die-casting or electro-erosion. ADVANTAGE - Results are achieved rather quickly. Unlike e.g. photochemical etching processes, large quantities of polluting chemicals are avoided. There are no electroplating or etching stages. In addition to impression, compression takes place, giving the tool a longer life. The operation is independent of the homogeneity of the structure and the hardness of the workpiece material. The method is particularly applicable for materials which are difficult to etch. A leather-like texture can be produced. Almost any type of texture can be produced, e.g. regular, free form, random and non-mathematical. Edges are rounded by suitable choice of materials and quantity of explosive, avoiding any further need for finishing.

: http://publica.fraunhofer.de/documents/PX-39460.html